Melt blended compositions, comprising up to 20 wt % of an optional additive, and 80-100 wt % of a copolycarbonate having a Tg of 200.degree. C. or more of (1) ##STR00001## wherein the mole ratio of x:y is 35:65 to 90:10, R.sup.1 is derived from a dihydroxy compound (2) ##STR00002## wherein R.sup.3 and R.sup.5 are each independently a halogen or a C.sub.1-6 alkyl group, R.sup.4 is a C.sub.1-6 alkyl, phenyl, or phenyl substituted with up to five halogens or C.sub.1-6 alkyl groups, and each c is independently 0 to 4; R.sup.2 is derived from a dihydroxy compound (6): ##STR00003## wherein R.sup.a and R.sup.b are each independently a halogen atom or a monovalent C.sub.1-6 alkyl group; p and q are each independently integers of 0 to 4; and X.sup.a is a divalent group; and 95 to 5 wt % of a polycarbonate having a Tg of less than 200.degree. C. of formula (9) ##STR00004## wherein R.sup.9 derived from a dihydroxy compound of formula (6); and 0.001 to 0.1 wt % of a transesterification catalyst.

 
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